![Photo shows a cotton seed aboard China\'s Chang\'e-4 lunar probe has sprouted, marking mankind\'s first biological experiment carried out on the moon. (Photo/Chongqing University)](http://www.ecns.cn/hd/2019/01/15/60546f810a254bbc8737115b0faac36a.jpg)
Photo shows a cotton seed aboard China's Chang'e-4 lunar probe has sprouted, marking mankind's first biological experiment carried out on the moon. (Photo/Chongqing University)
![Photo taken by the rover Yutu-2 (Jade Rabbit-2) on Jan. 11, 2019 shows the lander of the Chang\'e-4 probe. (Photo/China National Space Administration)](http://www.ecns.cn/hd/2019/01/15/38d5be49fbe541a3beb7268158017bf8.jpg)
Photo taken by the rover Yutu-2 (Jade Rabbit-2) on Jan. 11, 2019 shows the lander of the Chang'e-4 probe. (Photo/China National Space Administration)